Well the problem while yes its California, international shipments are handled by CBP, who are federal agents, and follow federal law rather than state law. Federally, (not too familiar with the paraphernalia law at all) I think its illegal to ship that stuff internationally. The story is also extremely vague. Were they going to a residential address? Commercial address? 8,300 bongs, split over 41 boxes, going to one single address is going to grab attention, I'm sure.
Obviously bongs are shipped from China every day without issue. Apparently its illegal. So dont just go ordering 8,000 of them at once? Maybe order a few smaller shipments instead? Also not sure what the average china glass bong goes for, but doing the math they value them at around 17 bucks a pop...
That said...tons of headshops out there operate every day without issue. It can be done.
My advice, dont be a typical headshop, if you go through with it. Like stretch said, theres a lot more to a business besides buy cheap sell high.
Just be different than your run of the mill headshop. Have any other local headshops? Do some research. See what they're selling, who their clientele typically is. If I had to guess, they have the standard grungy head shop vibe, operating under the guise of a tobacco shop but really targeting stoners.
With legalization around the corner, there will probably be a new target market coming up of people who want to try, but are NOT your typical stoner. If I were opening a head shop, I would aim for that market. The business men, the soccer moms, the people who would typically cringe and shy away from most head shops out there today. These are people who IMO wouldnt feel super comfortable walking into that semi-sketchy looking corner head shop with flashing lights and cheap displays filling the window. Give these people some place to feel comfortable coming to for all of their gear, a place they'll recommend to others in similar positions, idk... could work.